1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
|
/* Some string handling -- header
* Copyright (C) 2009 Chris Hall (GMCH), Highwayman
*
* This file is part of GNU Zebra.
*
* GNU Zebra is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published
* by the Free Software Foundation; either version 2, or (at your
* option) any later version.
*
* GNU Zebra is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNU Zebra; see the file COPYING. If not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef _ZEBRA_QFSTRING_H
#define _ZEBRA_QFSTRING_H
#include "zebra.h"
#include <stddef.h>
#include <stdint.h>
#ifndef Inline
#define Inline static inline
#endif
/* GCC have printf type attribute check. */
#ifdef __GNUC__
#define PRINTF_ATTRIBUTE(a,b) __attribute__ ((__format__ (__printf__, a, b)))
#else
#define PRINTF_ATTRIBUTE(a,b)
#endif /* __GNUC__ */
/*==============================================================================
* These "qfstrings" address the issues of dealing with *fixed* length
* strings, particularly where the string handling must be async-signal-safe.
*/
typedef struct qf_str qf_str_t ;
typedef struct qf_str* qf_str ;
/* When initialised a qf_string is set:
*
* str = start of string -- and this is never changed
* ptr = start of string -- this is moved as stuff is appended
* end = last possible position for terminating '\0'
* -- and this is never changed
*/
struct qf_str
{
char* str ; /* start of string */
char* ptr ; /* current position */
char* end ; /* end of string */
} ;
/*------------------------------------------------------------------------------
* Print format flags for number printing
*/
enum pf_flags
{
pf_none = 0,
/* The following correspond to the "flags" */
pf_commas = 1 << 0, /* "'" seen */
pf_plus = 1 << 1, /* "+" seen */
pf_space = 1 << 2, /* " " seen */
pf_zeros = 1 << 3, /* "0" seen */
pf_alt = 1 << 4, /* "#" seen */
pf_precision = 1 << 7, /* '.' seen */
/* The following signal how to render the value */
pf_hex = 1 << 8, /* hex */
pf_uc = 1 << 9, /* upper-case */
/* The following signal the type of value */
pf_ptr = 1 << 14, /* is a pointer */
pf_unsigned = 1 << 15, /* unsigned value */
/* Common combination */
pf_hex_x = pf_unsigned | pf_hex,
pf_hex_X = pf_unsigned | pf_hex | pf_uc,
pf_void_p = pf_ptr | pf_hex_x,
} ;
/*==============================================================================
* Functions
*/
extern void qfs_init(qf_str qfs, char* str, size_t size) ;
extern void qfs_init_as_is(qf_str qfs, char* str, size_t size) ;
extern void qfs_term(qf_str qfs, const char* src) ;
Inline int qfs_len(qf_str qfs) ;
Inline void* qfs_ptr(qf_str qfs) ;
Inline int qfs_left(qf_str qfs) ;
extern void qfs_append(qf_str qfs, const char* src) ;
extern void qfs_append_n(qf_str qfs, const char* src, size_t n) ;
extern void qfs_append_ch_x_n(qf_str qfs, char ch, size_t n) ;
extern void qfs_append_justified(qf_str qfs, const char* src, int width) ;
extern void qfs_append_justified_n(qf_str qfs, const char* src,
size_t n, int width) ;
extern void qfs_signed(qf_str qfs, intmax_t s_val, enum pf_flags flags,
int width, int precision) ;
extern void qfs_unsigned(qf_str qfs, uintmax_t u_val, enum pf_flags flags,
int width, int precision) ;
extern void qfs_pointer(qf_str qfs, void* p_val, enum pf_flags flags,
int width, int precision) ;
extern void qfs_printf(qf_str qfs, const char* format, ...)
PRINTF_ATTRIBUTE(2, 3) ;
extern void qfs_vprintf(qf_str qfs, const char *format, va_list args) ;
/*==============================================================================
* The Inline functions.
*/
/*------------------------------------------------------------------------------
* Current length of qf_str, not counting the terminating '\0'.
*/
Inline int
qfs_len(qf_str qfs)
{
return qfs->ptr - qfs->str ;
} ;
/*------------------------------------------------------------------------------
* Address of the terminating '\0'.
*/
Inline void*
qfs_ptr(qf_str qfs)
{
return qfs->ptr ;
} ;
/*------------------------------------------------------------------------------
* Current space left in the qstr, given what has been reserved for terminating
* '\0' and any other reservation.
*/
Inline int
qfs_left(qf_str qfs)
{
return qfs->end - qfs->ptr ;
} ;
#endif /* _ZEBRA_QSTRING_H */
|
